diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9427716..1052ef0 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,26 +1,16 @@
-name: Run tests
+name: Github Actions
 on: [push, pull_request]
 jobs:
   build:
-    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest]
 
-    steps:
-    - uses: actions/checkout@v1
-
-    - name: Cache choosenim
-      id: cache-choosenim
-      uses: actions/cache@v1
-      with:
-        path: ~/.choosenim
-        key: ${{ runner.os }}-choosenim-stable
-
-    - name: Cache nimble
-      id: cache-nimble
-      uses: actions/cache@v1
-      with:
-        path: ~/.nimble
-        key: ${{ runner.os }}-nimble-stable
+    runs-on: ${{ matrix.os }}
 
+    steps:
+    - uses: actions/checkout@v2
     - uses: jiro4989/setup-nim-action@v1
-
     - run: nimble test -y
+    - run: nimble test --gc:orc -y
diff --git a/tests/test_hexprint.nim b/tests/test_hexprint.nim
index 720fc82..db3d1a8 100644
--- a/tests/test_hexprint.nim
+++ b/tests/test_hexprint.nim
@@ -1,4 +1,4 @@
-import flatty/binny, flatty/hexprint, osproc, streams
+import flatty/binny, flatty/hexprint, streams
 
 var s = newFileStream("tests/test_hexprint-output.txt", fmWrite)
 
@@ -28,8 +28,3 @@ block:
   s.writeLine hexPrint(bin)
 
 s.close()
-
-let (outp, _) = execCmdEx("git diff tests/test_hexprint-output.txt")
-if len(outp) != 0:
-  echo outp
-  quit("Output does not match")